Unity3D实现渐变颜色效果

基于unity3D实现渐变颜色的简单脚本，代码很少，就不废话了，直接上代码和效果图。

效果图：

using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace ExtraFoundation.Components
{
 [AddComponentMenu("UI/Effects/Gradient")]
 public class UIGradient : BaseMeshEffect
 {
 #region Public Declarations
 public enum Type
 {
  Vertical,
  Horizontal
 }
 #endregion

 #region Public Properties
 public Type GradientType = Type.Vertical;
 [Range(-1f, 1f)]
 public float Offset = 0f;
 public Gradient gradient;
 #endregion

 #region Public Methods
 public override void ModifyMesh(VertexHelper helper)
 {
  if (!IsActive() || helper.currentVertCount == 0)
  {
  return;
  }

  vertexList.Clear();
  helper.GetUIVertexStream(vertexList);

  int nCount = vertexList.Count;
  switch (GradientType)
  {
  case Type.Vertical:
   {
   float fBottomY = vertexList[0].position.y;
   float fTopY = vertexList[0].position.y;
   float fYPos = 0f;

   for (int i = nCount - 1; i >= 1; --i)
   {
    fYPos = vertexList[i].position.y;
    if (fYPos > fTopY)
    fTopY = fYPos;
    else if (fYPos < fBottomY)
    fBottomY = fYPos;
   }

   float fUIElementHeight = 1f / (fTopY - fBottomY);
   UIVertex v = new UIVertex();

   for (int i = 0; i < helper.currentVertCount; i++)
   {
    helper.PopulateUIVertex(ref v, i);
    v.color = gradient.Evaluate((v.position.y - fBottomY) *
    fUIElementHeight - Offset);
    helper.SetUIVertex(v, i);
   }
   }
   break;
  case Type.Horizontal:
   {
   float fLeftX = vertexList[0].position.x;
   float fRightX = vertexList[0].position.x;
   float fXPos = 0f;

   for (int i = nCount - 1; i >= 1; --i)
   {
    fXPos = vertexList[i].position.x;
    if (fXPos > fRightX)
    fRightX = fXPos;
    else if (fXPos < fLeftX)
    fLeftX = fXPos;
   }

   float fUIElementWidth = 1f / (fRightX - fLeftX);
   UIVertex v = new UIVertex();

   for (int i = 0; i < helper.currentVertCount; i++)
   {
    helper.PopulateUIVertex(ref v, i);
    v.color = gradient.Evaluate((v.position.x - fLeftX) *
    fUIElementWidth - Offset);
    helper.SetUIVertex(v, i);
   }

   }
   break;
  default:
   break;
  }
 }
 #endregion

 #region Internal Fields
 private List<UIVertex> vertexList = new List<UIVertex>();
 #endregion
 }
}

虽然支持的内容不多，但是小而精，希望对大家有用。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。